// css2d/css2d_label.js
import {document,window,requestAnimationFrame,cancelAnimationFrame,Event,core} from 'dhtml-weixin';
import * as THREE from '../three/Three.js';
import { OrbitControls } from './jsm/controls/OrbitControls.js';
import { CSS2DRenderer, CSS2DObject } from './jsm/renderers/CSS2DRenderer.js';

import { GUI } from './jsm/libs/lil-gui.module.min.js';

var requestId
Page({
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
this.worker && this.worker.terminate()
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
	    webgl_touch(e) {
        const web_e = Event.fix(e)
        //window.dispatchEvent(web_e)
        //document.dispatchEvent(web_e)
        this.canvas.dispatchEvent(web_e)
    },
  async onLoad(){
const canvas3d = this.canvas =await document.createElementAsync("canvas","webgl")
var that = this
let gui;

			let camera, scene, renderer, labelRenderer;

			const layers = {

				'Toggle Name': function () {

					camera.layers.toggle( 0 );

				},
				'Toggle Mass': function () {

					camera.layers.toggle( 1 );

				},
				'Enable All': function () {

					camera.layers.enableAll();

				},

				'Disable All': function () {

					camera.layers.disableAll();

				}

			};

			const clock = new THREE.Clock();
			const textureLoader = new THREE.TextureLoader( );

			let moon;

			init();
			animate();

			function init() {

				const EARTH_RADIUS = 1;
				const MOON_RADIUS = 0.27;

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 200 );
				camera.position.set( 10, 5, 20 );
				camera.layers.enableAll();
				camera.layers.toggle( 1 );

				scene = new THREE.Scene();

				const dirLight = new THREE.DirectionalLight( 0xffffff );
				dirLight.position.set( 0, 0, 1 );
				dirLight.layers.enableAll();
				scene.add( dirLight );

				const axesHelper = new THREE.AxesHelper( 5 );
				axesHelper.layers.enableAll();
				scene.add( axesHelper );

				//

				const earthGeometry = new THREE.SphereGeometry( EARTH_RADIUS, 16, 16 );
				const earthMaterial = new THREE.MeshPhongMaterial( {
					specular: 0x333333,
					shininess: 5,
					map: textureLoader.load( 'textures/planets/earth_atmos_2048.jpg' ),
					specularMap: textureLoader.load( 'textures/planets/earth_specular_2048.jpg' ),
					normalMap: textureLoader.load( 'textures/planets/earth_normal_2048.jpg' ),
					normalScale: new THREE.Vector2( 0.85, 0.85 )
				} );
				const earth = new THREE.Mesh( earthGeometry, earthMaterial );
				scene.add( earth );

				const moonGeometry = new THREE.SphereGeometry( MOON_RADIUS, 16, 16 );
				const moonMaterial = new THREE.MeshPhongMaterial( {
					shininess: 5,
					map: textureLoader.load( 'textures/planets/moon_1024.jpg' )
				} );
				moon = new THREE.Mesh( moonGeometry, moonMaterial );
				scene.add( moon );

				//

				earth.layers.enableAll();
				moon.layers.enableAll();

				const earthDiv = document.createElement( 'div' );
				earthDiv.className = 'label';
				earthDiv.textContent = 'Earth';
				earthDiv.style.marginTop = '-1em';
				const earthLabel = new CSS2DObject( earthDiv );
				earthLabel.position.set( 0, EARTH_RADIUS, 0 );
				earth.add( earthLabel );
				earthLabel.layers.set( 0 );

				const earthMassDiv = document.createElement( 'div' );
				earthMassDiv.className = 'label';
				earthMassDiv.textContent = '5.97237e24 kg';
				earthMassDiv.style.marginTop = '-1em';
				const earthMassLabel = new CSS2DObject( earthMassDiv );
				earthMassLabel.position.set( 0, - 2 * EARTH_RADIUS, 0 );
				earth.add( earthMassLabel );
				earthMassLabel.layers.set( 1 );

				const moonDiv = document.createElement( 'div' );
				moonDiv.className = 'label';
				moonDiv.textContent = 'Moon';
				moonDiv.style.marginTop = '-1em';
				const moonLabel = new CSS2DObject( moonDiv );
				moonLabel.position.set( 0, MOON_RADIUS, 0 );
				moon.add( moonLabel );
				moonLabel.layers.set( 0 );

				const moonMassDiv = document.createElement( 'div' );
				moonMassDiv.className = 'label';
				moonMassDiv.textContent = '7.342e22 kg';
				moonMassDiv.style.marginTop = '-1em';
				const moonMassLabel = new CSS2DObject( moonMassDiv );
				moonMassLabel.position.set( 0, - 2 * MOON_RADIUS, 0 );
				moon.add( moonMassLabel );
				moonMassLabel.layers.set( 1 );

				//

				renderer = that.renderer = new THREE.WebGLRenderer({canvas:canvas3d});
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				labelRenderer = new CSS2DRenderer();
				labelRenderer.setSize( window.innerWidth, window.innerHeight );
				labelRenderer.domElement.style.position = 'absolute';
				labelRenderer.domElement.style.top = '0px';
				document.body.appendChild( labelRenderer.domElement );

				const controls = new OrbitControls( camera, labelRenderer.domElement );
				controls.minDistance = 5;
				controls.maxDistance = 100;

				//

				window.addEventListener( 'resize', onWindowResize );

				initGui();

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;

				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				labelRenderer.setSize( window.innerWidth, window.innerHeight );

			}


			function animate() {

				requestId = requestAnimationFrame(animate);

				const elapsed = clock.getElapsedTime();

				moon.position.set( Math.sin( elapsed ) * 5, 0, Math.cos( elapsed ) * 5 );

				renderer.render( scene, camera );
				labelRenderer.render( scene, camera );

			}

			//

			function initGui() {

				gui = new GUI();

				gui.add( layers, 'Toggle Name' );
				gui.add( layers, 'Toggle Mass' );
				gui.add( layers, 'Enable All' );
				gui.add( layers, 'Disable All' );

			}

}
})